miller



Patented) Dec. 27, 1859.

F r-nu.

UNITED STATES PATENTOFFICE,

LEBBEUS B. MILLER, or NEWARK, ew JERSEY, ASSIGNOB To AARON nuoR NE, in. 1

TOMPKINS, LhB. MILLER, o. TOMPKINS, AND DANL. HOIQSMAN.

MACHINE ron TURNING IRREGULAR Foams.

Specification of Letters Patent No. 26,567, datedDec emberZ'L 185$ l I I i To all whom it may concern:

Be it known that I, LEBBEUS B, MILLER, of the city of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Machines for Cutting Irregular Forms, known as the Crane lathe, invented by Aaron D. Crane, of the said city of Newark, and for which said invention Letters Patent of the United States were granted him, bearing date the th day of August, 185a; and

I do hereby declare that the following is a full, clear, and exact description of all my said improvements, reference being had to the accompanying drawings, makinga part of this specification, in which- Figure 1 is a perspective view of the essential parts of the said Crane irregular form machine exhibiting my improvements in the cutter head thereon, and Fig. 2 is a perpendicular section of the cutter wheel of the said improved machine, together with a perspective view of the consolidated cams or former B, together with a transverse section B of said consolidated cams or former. Fig. 3 is a view of the main or cutter disk of the cutter wheel showing the knife there on, and Fig.4 is a View of the smaller or fulcrum disk of the cutter wheel showing the arrangement of the sliding fulcrum or rest of the knife levers as invented by me and the screws by which said knife levers are adjusted. Figs. 1, 2, 3, and l are all that appertain directly to 1 my invention. The remaining Figs. 5, 6, and 7 areintroduced for the purpose of more clearly indi eating and describing my invention, and also serve to show the successive stages of modification of the knives thereof adopted and used by said Aaron D. Crane in and about his said lathe, subsequent to the granting to him of said Letters Patent and prior to my improvements as herein described.

The same letters indicate like parts in all the drawings.

In Fig. 1, A, A, is the cutter head, ar

ranged with any required number of kniv s, (in this case S knives only are introduced, but ordinarily from 28 to 3O knives are employed.) E, is the material to be cut, and

-is held in center and revolved at precisely the same rate of speed as the cutter head, the two being connected together by the gearing e, c, (Fig. 1,) and driven by means of a belt running on a pulley adjusted on the cutter shaft at S,

which the Cranes lathefoperates being such that each one ofthegkn ves.cutsits own;

peculiar section, returning at each revolu tlon to meet the wood at prec sely the same longitudinal line on itsi-circmnferencer 5 It becomes necessary in order to. produce an irregular form (the circumference oflwhich 9 shall be divided longitudinally-into plane. sections as abovey thatthe gknives c, c, c, (Fig. 1,) should; be moved, longitudinally from leftto right-or fronrright to left,;

along and in contact with the said wood as the cutter head and said woodirevolvesrand that said knives should also: respectivelylbe moved in toward orout. from the center of said cutter head as maybe necessary from the nature of thework to; be done.

longitudinally to and fro ontheshjaftS by means of appropriate} attacl nientsfl but which however are not shown in the drawing Fig. 1, as said attachmentsare not essen-c tial to illustrate theimprovements made by me, and the cuttersjio, c, c, are moved out o a a ecomplish the first, the cutter head {is moved means of their centrifugal force, and the use of the consolidated. camslor former B, (Figs. 1, and #2,) which is slowly movedfrom left to right, or from right ltoleftQa-nd into or out of the cutter head, as ts work 170 while revolving to the lateral :movemehtsre:

spectively above described. a

The consolidated cams or former B. is

made in four ormore sections as represented at B, Fig. :2, of metal or woO l and is held onto the cylinder towhiclrit is attached by means of the strap seen at D, Figs. 1 and? j B is moved to the right or left bymeans of appropriate attachments which do not appear in the drawing, as such movements may I be accomplished many deslred or approved way, and is not essential to my improvements. The cuttersc, c, c,with theknife stocks attachedthereto are adjusted to slide freely in and out,to and fromthe center of. the cutter head A, A, and into the central ends of said knife stocks are fitted the knife 5 levers m, m, m, (Figs; 1 and2,) and attached to the other 61'1d1i of the levers m, m, 3

m, are the counterbalances 0, 0;, 0; j levers m, m, m, are pivotedvat their centers The r 1% and in from the center of A,as required by 1 in the disk A, as represented, and are attached by means of a crotch and pin to the sliding fulcrum or rest seen at p, 20, (Figs. 2 and 4,) and adjusted in the fulcrum disk A of the cutter head A, A. These fulcra or rests p, p are adjusted at suitable distances from the center of motion by means of the screws 1-, 1", (Figs. 2 and A) thereby giving the required set to the knives 0, c, 0. The weight of each of the cutters 0, together with its knife stock is, is somewhat greater than the Weight of the counter balance at the other end of the levers m, so that when the machine is in motion the centrifugal force of 0 being somewhat greater than the centrifugal force of O, the effect is to keep 0 pressed down and in constant contact with the consolidated cams or former B. The small rollers seen on the ends of O, O and resting on B are'for the purpose of lessening the friction occasioned by the movements of B, in contact with 0, when the machine is in operation.

The operation of the improved machine is as follows: The cutting head A, A and material E being set to revolving at a high rate of speed, the centrifugal force will throw the cutters 0, 0, c as far out as they can go, and until the small rollers inO, O are brought in firm contact with the consolidated cams or former B. The material E is then thrown up into contact with the said cutters c, c, 0, (the machine being so constructed as to permit this) and the cutter head is then brought to move along the shaft S in a direction longitudinal to the work, and the consolidated cams or former B is also brought to move along the said shaft S in a longitudinal direction and at the proper speed, and into or out from the said cutter head by means of the contact of the rollers in O as aforesaid, causing the said cutters c, 0, a to assume and change their position as the work progresses, correspondlng exactly with the conformation of the difierent sections of said consolidated cams or former.

In Fig. 5 is shown substantially one of the first methods employed by said Crane to control the cutting knives by means of the cams b, b referred to by him in the specification of his said patent. No counter balances were employed and the cams b, b were separate and apart from each other, and separatelv attached to the disk at.

In Fig. 6 is shown another method employed by him, in which the knives are counter balanced at 71, and the cams b, b are still separate and apart and are attached substantially as in Fig. 5.

In Fig. 7 is shown the improvements claimed by me, viz., a fulcrum disk A, the lever m, and counter balance 0, attached to said levers, and the consolidated cams or former B. The difference between the cutter heads of Fig. 7 and Fig. 1 being found essentially in the removing in Fig. 7 of all the cutter head projecting to the left of A, and by bringing 0 down into contact with B, and thus dispensing with considerable Weight in the fitting and use of the sliding pieces 00, x, with the rollers attached thereto.

Having thus (in order that there may eX- ist no misapprehension) clearly and freely described the said Cranes lathe with my improvements, together with the material steps made by him and myself leading to such improvements, I will proceed to point out and to claim specifically the improvements invented by me as aforesaid.

What I claim therefore as my invention and desire to secure by Letters Patent of the United States, is-

1. The double disk cutter head A, A, constructed substantially in the manner and for the purposes described.

2. I'claim the consolidation of the separate cams b, 6, Figs. 5 and 6, into a solid former or consolidated cams B, Figs. 1, 2, and 7, and the use of such consolidated cams or former in combination with the said Cranes lathe.

3. I claim the use of the levers m, m, Figs. 1 and 2, formed and adjusted in the cutters head substantially as described.

LEBBEUS B. -MILLER.

Witnesses:

S. W. MILLER, JAMES M. HULME. 

